flow_offload: check for basic action hw stats type

Introduce flow_action_basic_hw_stats_types_check() helper and use it
in drivers. That sanitizes the drivers which do not have support
for action HW stats types.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt_tc.c

@@ -279,7 +279,8 @@ bnxt_tc_parse_pedit(struct bnxt *bp, struct bnxt_tc_actions *actions,
 
 static int bnxt_tc_parse_actions(struct bnxt *bp,
 				 struct bnxt_tc_actions *actions,
-				 struct flow_action *flow_action)
+				 struct flow_action *flow_action,
+				 struct netlink_ext_ack *extack)
 {
 	/* Used to store the L2 rewrite mask for dmac (6 bytes) followed by
 	 * smac (6 bytes) if rewrite of both is specified, otherwise either
@@ -299,6 +300,9 @@ static int bnxt_tc_parse_actions(struct bnxt *bp,
 		return -EINVAL;
 	}
 
+	if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, flow_action) {
 		switch (act->id) {
 		case FLOW_ACTION_DROP:
@@ -491,7 +495,8 @@ static int bnxt_tc_parse_flow(struct bnxt *bp,
 		flow->tun_mask.tp_src = match.mask->src;
 	}
 
-	return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action);
+	return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action,
+				     tc_flow_cmd->common.extack);
 }
 
 static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp,

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c

@@ -544,7 +544,8 @@ static bool valid_pedit_action(struct net_device *dev,
 }
 
 int cxgb4_validate_flow_actions(struct net_device *dev,
-				struct flow_action *actions)
+				struct flow_action *actions,
+				struct netlink_ext_ack *extack)
 {
 	struct flow_action_entry *act;
 	bool act_redir = false;
@@ -552,6 +553,9 @@ int cxgb4_validate_flow_actions(struct net_device *dev,
 	bool act_vlan = false;
 	int i;
 
+	if (!flow_action_basic_hw_stats_types_check(actions, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, actions) {
 		switch (act->id) {
 		case FLOW_ACTION_ACCEPT:
@@ -642,7 +646,7 @@ int cxgb4_tc_flower_replace(struct net_device *dev,
 	struct filter_ctx ctx;
 	int fidx, ret;
 
-	if (cxgb4_validate_flow_actions(dev, &rule->action))
+	if (cxgb4_validate_flow_actions(dev, &rule->action, extack))
 		return -EOPNOTSUPP;
 
 	if (cxgb4_validate_flow_match(dev, cls))

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.h

@@ -112,7 +112,8 @@ void cxgb4_process_flow_actions(struct net_device *in,
 				struct flow_action *actions,
 				struct ch_filter_specification *fs);
 int cxgb4_validate_flow_actions(struct net_device *dev,
-				struct flow_action *actions);
+				struct flow_action *actions,
+				struct netlink_ext_ack *extack);
 
 int cxgb4_tc_flower_replace(struct net_device *dev,
 			    struct flow_cls_offload *cls);

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c

@@ -286,7 +286,8 @@ int cxgb4_tc_matchall_replace(struct net_device *dev,
 		}
 
 		ret = cxgb4_validate_flow_actions(dev,
-						  &cls_matchall->rule->action);
+						  &cls_matchall->rule->action,
+						  extack);
 		if (ret)
 			return ret;
 

drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c

@@ -1082,6 +1082,9 @@ static int mvpp2_port_c2_tcam_rule_add(struct mvpp2_port *port,
 	u8 qh, ql, pmap;
 	int index, ctx;
 
+	if (!flow_action_basic_hw_stats_types_check(&rule->flow->action, NULL))
+		return -EOPNOTSUPP;
+
 	memset(&c2, 0, sizeof(c2));
 
 	index = mvpp2_cls_c2_port_flow_index(port, rule->loc);
@@ -1305,6 +1308,9 @@ static int mvpp2_cls_rfs_parse_rule(struct mvpp2_rfs_rule *rule)
 	struct flow_rule *flow = rule->flow;
 	struct flow_action_entry *act;
 
+	if (!flow_action_basic_hw_stats_types_check(&rule->flow->action, NULL))
+		return -EOPNOTSUPP;
+
 	act = &flow->action.entries[0];
 	if (act->id != FLOW_ACTION_QUEUE && act->id != FLOW_ACTION_DROP)
 		return -EOPNOTSUPP;

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -2878,6 +2878,9 @@ static int parse_tc_nic_actions(struct mlx5e_priv *priv,
 	if (!flow_action_has_entries(flow_action))
 		return -EINVAL;
 
+	if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
 	attr->flow_tag = MLX5_FS_DEFAULT_FLOW_TAG;
 
 	flow_action_for_each(i, act, flow_action) {
@@ -3330,6 +3333,9 @@ static int parse_tc_fdb_actions(struct mlx5e_priv *priv,
 	if (!flow_action_has_entries(flow_action))
 		return -EINVAL;
 
+	if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, flow_action) {
 		switch (act->id) {
 		case FLOW_ACTION_DROP:
@@ -4148,6 +4154,9 @@ static int scan_tc_matchall_fdb_actions(struct mlx5e_priv *priv,
 		return -EOPNOTSUPP;
 	}
 
+	if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, flow_action) {
 		switch (act->id) {
 		case FLOW_ACTION_POLICE:

drivers/net/ethernet/mscc/ocelot_flower.c

@@ -17,6 +17,10 @@ static int ocelot_flower_parse_action(struct flow_cls_offload *f,
 	if (!flow_offload_has_one_action(&f->rule->action))
 		return -EOPNOTSUPP;
 
+	if (!flow_action_basic_hw_stats_types_check(&f->rule->action,
+						    f->common.extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, a, &f->rule->action) {
 		switch (a->id) {
 		case FLOW_ACTION_DROP:

drivers/net/ethernet/netronome/nfp/flower/action.c

@@ -1207,6 +1207,10 @@ int nfp_flower_compile_action(struct nfp_app *app,
 	bool pkt_host = false;
 	u32 csum_updated = 0;
 
+	if (!flow_action_basic_hw_stats_types_check(&flow->rule->action,
+						    extack))
+		return -EOPNOTSUPP;
+
 	memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
 	nfp_flow->meta.act_len = 0;
 	tun_type = NFP_FL_TUNNEL_NONE;

drivers/net/ethernet/qlogic/qede/qede_filter.c

@@ -1746,7 +1746,8 @@ int qede_get_arfs_filter_count(struct qede_dev *edev)
 }
 
 static int qede_parse_actions(struct qede_dev *edev,
-			      struct flow_action *flow_action)
+			      struct flow_action *flow_action,
+			      struct netlink_ext_ack *extack)
 {
 	const struct flow_action_entry *act;
 	int i;
@@ -1756,6 +1757,9 @@ static int qede_parse_actions(struct qede_dev *edev,
 		return -EINVAL;
 	}
 
+	if (!flow_action_basic_hw_stats_types_check(flow_action, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, flow_action) {
 		switch (act->id) {
 		case FLOW_ACTION_DROP:
@@ -1970,7 +1974,7 @@ int qede_add_tc_flower_fltr(struct qede_dev *edev, __be16 proto,
 	}
 
 	/* parse tc actions and get the vf_id */
-	if (qede_parse_actions(edev, &f->rule->action))
+	if (qede_parse_actions(edev, &f->rule->action, f->common.extack))
 		goto unlock;
 
 	if (qede_flow_find_fltr(edev, &t)) {
@@ -2038,7 +2042,7 @@ static int qede_flow_spec_validate(struct qede_dev *edev,
 		return -EINVAL;
 	}
 
-	if (qede_parse_actions(edev, flow_action))
+	if (qede_parse_actions(edev, flow_action, NULL))
 		return -EINVAL;
 
 	return 0;

drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c

@@ -367,7 +367,8 @@ static int tc_setup_cbs(struct stmmac_priv *priv,
 
 static int tc_parse_flow_actions(struct stmmac_priv *priv,
 				 struct flow_action *action,
-				 struct stmmac_flow_entry *entry)
+				 struct stmmac_flow_entry *entry,
+				 struct netlink_ext_ack *extack)
 {
 	struct flow_action_entry *act;
 	int i;
@@ -375,6 +376,9 @@ static int tc_parse_flow_actions(struct stmmac_priv *priv,
 	if (!flow_action_has_entries(action))
 		return -EINVAL;
 
+	if (!flow_action_basic_hw_stats_types_check(action, extack))
+		return -EOPNOTSUPP;
+
 	flow_action_for_each(i, act, action) {
 		switch (act->id) {
 		case FLOW_ACTION_DROP:
@@ -530,7 +534,8 @@ static int tc_add_flow(struct stmmac_priv *priv,
 			return -ENOENT;
 	}
 
-	ret = tc_parse_flow_actions(priv, &rule->action, entry);
+	ret = tc_parse_flow_actions(priv, &rule->action, entry,
+				    cls->common.extack);
 	if (ret)
 		return ret;
 

include/net/flow_offload.h

@@ -3,6 +3,7 @@
 
 #include <linux/kernel.h>
 #include <linux/list.h>
+#include <linux/netlink.h>
 #include <net/flow_dissector.h>
 #include <linux/rhashtable.h>
 
@@ -251,6 +252,66 @@ static inline bool flow_offload_has_one_action(const struct flow_action *action)
 	return action->num_entries == 1;
 }
 
+static inline bool
+flow_action_mixed_hw_stats_types_check(const struct flow_action *action,
+				       struct netlink_ext_ack *extack)
+{
+	const struct flow_action_entry *action_entry;
+	u8 uninitialized_var(last_hw_stats_type);
+	int i;
+
+	if (flow_offload_has_one_action(action))
+		return true;
+
+	for (i = 0; i < action->num_entries; i++) {
+		action_entry = &action->entries[i];
+		if (i && action_entry->hw_stats_type != last_hw_stats_type) {
+			NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
+			return false;
+		}
+		last_hw_stats_type = action_entry->hw_stats_type;
+	}
+	return true;
+}
+
+static inline const struct flow_action_entry *
+flow_action_first_entry_get(const struct flow_action *action)
+{
+	WARN_ON(!flow_action_has_entries(action));
+	return &action->entries[0];
+}
+
+static inline bool
+flow_action_hw_stats_types_check(const struct flow_action *action,
+				 struct netlink_ext_ack *extack,
+				 u8 allowed_hw_stats_type)
+{
+	const struct flow_action_entry *action_entry;
+
+	if (!flow_action_has_entries(action))
+		return true;
+	if (!flow_action_mixed_hw_stats_types_check(action, extack))
+		return false;
+	action_entry = flow_action_first_entry_get(action);
+	if (allowed_hw_stats_type == 0 &&
+	    action_entry->hw_stats_type != FLOW_ACTION_HW_STATS_TYPE_ANY) {
+		NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
+		return false;
+	} else if (allowed_hw_stats_type != 0 &&
+		   action_entry->hw_stats_type != allowed_hw_stats_type) {
+		NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
+		return false;
+	}
+	return true;
+}
+
+static inline bool
+flow_action_basic_hw_stats_types_check(const struct flow_action *action,
+				       struct netlink_ext_ack *extack)
+{
+	return flow_action_hw_stats_types_check(action, extack, 0);
+}
+
 #define flow_action_for_each(__i, __act, __actions)			\
         for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])
 

net/dsa/slave.c

@@ -865,6 +865,10 @@ static int dsa_slave_add_cls_matchall(struct net_device *dev,
 	if (!flow_offload_has_one_action(&cls->rule->action))
 		return err;
 
+	if (!flow_action_basic_hw_stats_types_check(&cls->rule->action,
+						    cls->common.extack))
+		return err;
+
 	act = &cls->rule->action.entries[0];
 
 	if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {